Stackable glass



FIG. 1 is a perspective view of a stackable glass showing our new design;

FIG. 2 is a front elevational view thereof; the left side elevational view, the right side elevational view, and the rear elevational view being identical;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof. 

CLAIM The ornamental design for a stackable glass, as shown and described. 